Improvement in hydraulic motors



-f UNITED STATES PATENT OFFICE.

JAMESHARRIS, or BOSTON, MASSACHUSETTS.

/|elioillaivnaiaT IN HYDRAULIC MOTORS.

To all 'whom tmay concern:

Be it known 4that I, JAMES HARRIS, of Boston, of the county of Suffolk and State of Massachusetts, haveinvented anew and useful HydraulicMotor 5 and I do hereby declare the same to be fully described as follows, reference bein g had to the accompanying drawings, making part of this my specification.

In carrying out my present invention I have `combined withla water-meter or hydraulic apparatus, substantially as described and represented in Letters Patent No. 88,475, dated March 301869, and granted to ine, a pair of `piston-rods, a double-,cranked shaft, two slideyokes, and guides therefor, whereby I am enabled to adapt the said hydraulic apparatus shown in such patent for use as a motor or means of obtaining from the reciprocating rectpistons a rotary `I have dispensed with the groove and stud for such purpose, as represented in my said patent, and I have supported the-piston-yokes on and so applied them to guide-rails as to cause such yokes and guid erails,with the piston-rods, to maintain the pistons from revolving, the yokes also performing other duties-viz., that of operating withand actuating the cranks of the shaft.

By the additions I have made to the watermeter, as `described in the aforementioned patent, the pistons, while the machine is in operation, are both in movement at one and the same time and in opposite directions, whereas withoutsuch additions one would be at rest y while the other might be in motion, and in order that the machine may operate to good advantage its parts should generally be somewhat A wider in proportion to the size of the pistons than is represented in the drawings of such patent. y

My present hydraulic motor is calculated for Vmoving the bellows of an organ or musical in- Specificration forming part of Letters Patent No. 105,450, dated J ulyv `19, 1870.

` l strument, or putting in operation a house or hotelelevator, or d oin g other work where there is only an occasional necessity for the exertion of much power.`

Oi the said drawings, Figure 1 is a horizontal section of the two cylinderswithout their pistons. cylinders with their pistons. Fig. 3` is a longitudinal section taken through one of the pistous, its rod, and yoke. Fig.v 4 is an under-side View, and Fig. 5 a side elevation, of one of the valve-pistons. Fig. 6 is au oblique section of such valve-piston, the plane of section being taken through one ofit-s obliquewater-passages. Fig. 7 is a side elevation of the motor. Fig. 8 is an oblique section of the case or cylinders, taken through one of the oblique passages leading from one pistou-cylinder to or about to the end of the other. Fig. 9 is a longitudinal section of the piston D. Fig. 10 is a similar section of the piston E, while Fig. ll is an underside view of the piston D, and Fig. 12 a similar view of the piston E, as hereinafter explained. Fig. 13 is a top view; Fig. 14, a front end elevation, and Fig. 15 a horizontal section, of the motor. Fig. 16 is'a bottom view of the two connected cylinders with their bottcmpart plate removed so as to show the ports or passages of such cylinders. p

Ashereinbefore mentioned,theessentialcharacteristics of the pistons and cylinders are theV same as those described and represented in the said patent. Therefore it will not be necessary for me to enter into a further description of them, except it be to state that A and B denote the two cylinders, arranged side by side, each being provided with a piston, as shown at D and E, made to open laterally into both cylinders, which open at their junctions into each other, as shown at C. Each piston has a rod, F,extended from it` through one head of its cylinder, and having xed to its outer end a rectangular frame or yoke, Gr, which at bottoln rests upon and spans a straight guide-rail, I, arranged on the bed-plate K in manner as represented. Within each of the two vokes Gr G there is a vertical slider or boX, H, which encompasses or receives the wrist of one of two bell-cranks, L L, which span the yokes and project at a right angle to each other from a shaft, M, supported in bearings applied to two stand- Fig. 2 is a transverse section of Such vrails, with the shaft-cranks and piston-rods, I

am enabled to dispense with long connectingrods, and thereby reducethe whole engine into less length or compass; and,besides,I am enabled to maintain the valve-pstons in their correct relations with their cylinders or to prevent the pistons from turning around in the cylinders so as to affect the proper disposition of the operative ports or passages of the cylinders and pistons.

I claim as my invention- The hydraulic motor, constructed as described-viz., as composed of the yokes, the guides, the piston-rods, the double-cranked shaft, and the patented meter, as described, or hereinbefore mentioned and represented, all the said parts being` arranged and to operate together as explained.

JAMES HARRIS. \Vitncsses:

R. H. EDDY, J. R. SNOW. 

